Hoisting apparatus



Oct. 15, 192.9. T, CARLSON 1,731,970

HoIsTING APPARATUS Filed July 26, 1927 :NvENToR #Moda/e [ar/sar 2/ Y Z/f lBY ATTORNEY that the load may be raised or lowered through themedium-of the hoisting cable 16 while the releasing cable isinoperative.

The advantages of the present invention reside principally in the use,first, of an improved form of grappling jaws which ensures a betterdistribution of the load; secondly, of the swiveled block for guidingthe hoisting cable 16 ensures that the latter will act centrally ofthegrapple in a manner to retain the same vertically; and, thirdly, of theguide pulleys for the grapple releasing cable yconnections and theirarrangement is such as will permit a rapid disengagement of thegrappling jaws from a load. Iny the present invention, moreover, theapertured swivel block connection 14 of the frame members 5 providesaguide whereby the hoisting cable 16 is attachable directly to theclevis 25 for supporting the grapple. And byy the provision of thepulleys 10 and 11 mounted in the lugs 81 and 91 in oiiset relationromthe .bar elements 6 to which the grappling levers 21-23 areconnected, enables the latter to be actuated for disengaging the jawsfrom a load.`

WhatI claim, is,-

1. In apparatus of the character described,

`a grappling device consisting of two frame members, an apertured blockpivotally connected to the upper ends of both of said members, a pair oflevers fulcrumed intermediate their respective lengths to the lower endsof said frame members and affording a pair of Vso jaw arms below theframe members and a pair of arms between said members, a hoisting cableextending through the aperture of said block and operatively connectedto the last named arms, a releasing cable provided with branches whoselower ends are connected to said jaw arms, and pulleys mounted upon therespective :trame members and serving to guide ,the cable branches tohave the lower ends thereof depend from the frame to the respectivearms.

2. In apparatus of the character described, a pair of frame members eachprovided with laterally protruding lug elements, an apertured block, apin pivotally connecting the upper end of each of the frame members tothe block, cable-guidingpulleys rotatably connectedto each of theframelugs, a pair of grappling levers ulcrumed to the lower ends of saidframe members, each of said levers having a bifurcated hook armdepending from the ad'acent framevmember and a second arm locate betweenthe-frame members, a pin pivotally connecting the second named arms ofboth levers together, a hoisting cable connected with the second namedarms and extending through said apertured block, and a releasing cablehaving branches the lower ends of which are connected to the hook arms rber fulcrumed at approximately its midlength to the free end of each ofsaid trame members, said lever members being formed to provide opposingjaw elements below the frame, a hoisting cable extending through theaperture of said block and connected interiorly of the frame with endsof both of the lever members, a releasing cable, and iexible connectionsprovided upon the releasingl cable, said connections extending over andabout the pulleys ot the respective frame members and connected withsaid lever jaws whereby the latter are swingable into and from theiroperative positions by employing one or the other of said cables.

Signed at Seattle, Washington, this 21st day of J une, 1927.

THEODORE CARLSON.

